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Getting a brand-new lab fume cupboard can be extremely challenging if you are getting it for the first time. Today, there are multiple variants in the market that you need to consider. Hence, it is essential to understand where you can start and what is worth.
Today, several brands provide high-end fume cupboards. To know more about it, you can check out https://topairsystems.com/. Some of the essential things to consider when you are buying one, include the following:
- Ductless and ducted fume cupboards
It would help if you decided whether you wish to opt-in for ductless or ducted unit. Choosing a ductless fume cupboard can suck the air inside the front unit via the filter. After that, it can exhaust the air to the room. As a result, it is a good choice for the application that doesn’t need significant fractions of chemicals, with movability being the primary consideration.
The expense of commissioning and installing the ductless fume cupboard is much lower. However, it is available with a few unlucky caveats. It comprises of the end-to-end costs of the replacement filters. It also includes the forbidden use of specific chemical compounds.
With the increase of environmental control, most people are selecting ductless units because exhausting the dangerous chemicals back to the ambiance should be averted. The ducted fume cupboards, on the other hand, follow this pattern. It concentrates on taking out the air from the front unit and releasing the fume back into the ambiance via the customized ventilation system.
There is a benefit of using the ducted solution. Once it gets fitted, there is minimal chance of maintenance work other than the LEV test in 14 months. Usually, these cupboards are the best option when your lab is going through construction work, enabling the installers to fit and assemble the ventilation shafts without developing any constant disruption. Additionally, the ducted units are able to manage the big chemical quantities with zero filter restrictions, thereby maximizing versatility.
According to experts, you should choose the ductless unit if there is a lab already existing. It reduces the installation expense. Choosing a ducted unit is a smart move when you decide to create a new lab. It provides varied use, and the continual cost is less.
- The access
Are there the required access needed and the space for containing a brand-new fume cupboard? You need to clearly define ceiling heights, corridors and doorway widths during the planning stage. Else, you have to pay unexpected expenses for a high-end device. When you think you don’t have the essential data, you should go ahead and ask. In most cases, the manufacturer can assist you with anything which you might have missed.
- Optimum size
You need to check the size of the fume cupboard that is correct for you, Simply because the manufacturers only showcase a single standard size unit, various other choices need to be made available. You need to mention all that you need, considering the specifications and dimensions, to ensure you acquire the ideal outcome.
It could be that you need a specialized device, for instance, a storage cabinet or the workbench! It would help if you shared this with the manufacturer. They can custom-develop a bespoke unit that optimizes the space and caters to the needs. You need to write down all the specifications before searching for all that is in the market. Fume cupboard specialists can hardly have an issue with the device’s design. It is always possible to scale back from there in case all that you are searching for isn’t viable physically.
- The chemical assessment
Is there a list of chemicals that you have decided use within the cabinet? It is necessary to know the requirements so that you can avert the hazardous chemical reactions. For instance, the fume cupboard sashes conventionally resort to hardened glass. But the ones that make use of the hydrofluoric acid, it will etch the glass severely. The ideal solution here might be the polycarbonate sash.
So, go ahead and share the chemical list and the quantity of usage with your manufacturer at the start of the planning stage to attain the ideal recommendation. They will possess a solution.
- The Variable Air Volume (VAV)
The fume cupboards usually need huge chunks of energy to function effectively, resulting in heat loss owing to the total air volume extracted from a room. The moment you are installing the cupboard, it is necessary for the face velocity to remain anything between 0.3 and 0.5m/s, along with a sash. It indicates that the face velocity can change based on the sash height. There is a risk to the user safety when there is a drop in the face velocity. As face velocity goes up, there is an energy loss.
The best solution here is the VAV, which can manage the face velocity depending on the sash height. It doesn’t just ensure operator security but helps to bring down heat loss as well. Additionally, the fan speed gets reduced as the sash gets lowered, thereby maximizing the product’s life expectancy.
Things that you need to ask while buying a fume hood
The fume hoods are essential. However, at times it proves to be an expensive investment in several labs. When you are buying a fume hood, it is essential to ensure that you have the correct cupboard for your budget and lab. Some of the critical questions to ask for include the following:
- What is essential for the installation?
For any new device, you need installation. Based on the expertise level, you can get it done by yourself or seek help from the local contractor. Work environment keeps changing. As a result of which, the fume hoods are available with multiple features. Hence, the installation depth will keep varying. However, when you are buying a fume hood, you need to consider the electrical, plumbing and the ventilation requirements.
- What gets used to make the fume cupboard?
Create a list of every material that you intend to use in your hood. It will decide the fume cupboard that you need to construct. A few chemicals can degrade, attack or physically change certain hood materials. In case you wish to use the strong corrosives, you should keep an eye for the hood that can withstand daily use.
The manner in which the hood gets constructed needs to impact the purchase. If the hood is composed of inferior-quality material, it might affect the device life cycle. It means that when you invest in a high-quality hood, the product life will be more.
- What is the cost?
The average cost of a six-foot fume hood depends on multiple factors. Based on what the industry professionals will have to say, it is anything between $1,200 and $2,500 for every linear foot. The factors like the special features, hood dimensions, add-ons and technology need to get considered when a hood is getting priced. Various processes might need specific hoods. For instance, the fume cupboard designed for the spill container will have a different price, compared to the fume hood made for very hazardous substances. You don’t just need to factor in the hood expense but also have to consider the operational and installation costs.
- Installation expenses – It will vary depending on the features of the fume hood and the installation location. Several times installation can get accomplished by hiring qualified contractors or you can do-it-yourself. Everything is based on the installer’s know-how, including the building layout, the fume hood needs, and the installation project scope.
- Operational expenses – Similar to several devices, the fume hoods too operate on electricity. Even though it might affect the operating costs, there are several ways for conserving the energy using a standard fume hood. The following points are essential:
- Shutting the sash
- Switching off the occupancy switch at times when you aren’t using the fume hood
- Optimize the placement of the fume hood in the lab
- Investing in the energy recovery device
- Optimize blower usage when you have more than a single fume
- What are the security controls that get added to the base expense of a unit?
The fume cupboards might have airflow monitors. But there are only specific fume hoods that it in-built. When the fume hood that you bought doesn’t come with an airflow monitor, it is necessary to buy it separately. The airflow motions will cost between a couple hundred to a thousand dollars.
You will come across two primary kinds of airflow monitors, which is digital and analog. If the fume hood is on the CAV (constant air volume) system, you can use the analog and the online airflow monitor offered by the hood manufacturer. On the other hand, when the fume hood is atop the VAV, the airflow monitor will have to arrive from a VAV supplier for it to get correctly calibrated to the VAV system.
Once you keep all these things in mind, you will realize that buying a fume hood is a good investment and the security advantages are priceless.
